> the basic idea of the key stone excel pipeline is to bring tar sand oil from canada down into the united states. zenaphobia isn't the issue here. what that matters is whether we are expanding our fossil fuel infrastructure and dumps more greenhouse gases into the atmosphere or whether we're going to make a transition into renewables and other technology that don't use the atmosphere as a waste dump. >> cenk: what happens if we bring in the tar sand oils? is an epic disaster real, and how so? >> well, i maybe take a slightly different perspective than jim hansen in i don't think that the emissions from the oil, from this particular pipeline tips the scales to make the difference between a disaster and a wonderful idyllic in life. it sense a symbol to the world of the concrete action we say take. if president obama wants a legacy as being the president who turned u.s. energy policy around, and started getting us transitioned from the old fossil fuel based economy from the last century to the near zero emission energy system of the 21st century, then he needs to deny the permit to this pipe